-#ifndef MMIOTRACE_H
-#define MMIOTRACE_H
-
-#include <asm/types.h>
-
-#define MMIO_VERSION 0x04
-
-/* mm_io_header.type */
-#define MMIO_OPCODE_MASK 0xff
-#define MMIO_OPCODE_SHIFT 0
-#define MMIO_WIDTH_MASK 0xff00
-#define MMIO_WIDTH_SHIFT 8
-#define MMIO_MAGIC (0x6f000000 | (MMIO_VERSION<<16))
-#define MMIO_MAGIC_MASK 0xffff0000
-
-enum mm_io_opcode { /* payload type: */
- MMIO_READ = 0x1, /* struct mm_io_rw */
- MMIO_WRITE = 0x2, /* struct mm_io_rw */
- MMIO_PROBE = 0x3, /* struct mm_io_map */
- MMIO_UNPROBE = 0x4, /* struct mm_io_map */
- MMIO_MARKER = 0x5, /* raw char data */
- MMIO_UNKNOWN_OP = 0x6, /* struct mm_io_rw */
-};
+#ifndef _LINUX_MMIOTRACE_H
+#define _LINUX_MMIOTRACE_H
-struct mm_io_header {
- __u32 type;
- __u32 sec; /* timestamp */
- __u32 nsec;
- __u32 pid; /* PID of the process, or 0 for kernel core */
- __u16 data_len; /* length of the following payload */
-};
+#include <linux/types.h>
+#include <linux/list.h>
-struct mm_io_rw {
- __u64 address; /* virtual address of register */
- __u64 value;
- __u64 pc; /* optional program counter */
-};
+struct kmmio_probe;
+struct pt_regs;
-struct mm_io_map {
- __u64 phys; /* base address in PCI space */
- __u64 addr; /* base virtual address */
- __u64 len; /* mapping size */
- __u64 pc; /* optional program counter */
+typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *,
+ struct pt_regs *, unsigned long addr);
+typedef void (*kmmio_post_handler_t)(struct kmmio_probe *,
+ unsigned long condition, struct pt_regs *);
+
+struct kmmio_probe {
+ /* kmmio internal list: */
+ struct list_head list;
+ /* start location of the probe point: */
+ unsigned long addr;
+ /* length of the probe region: */
+ unsigned long len;
+ /* Called before addr is executed: */
+ kmmio_pre_handler_t pre_handler;
+ /* Called after addr is executed: */
+ kmmio_post_handler_t post_handler;
+ void *private;
};
+extern unsigned int kmmio_count;
+
+extern int register_kmmio_probe(struct kmmio_probe *p);
+extern void unregister_kmmio_probe(struct kmmio_probe *p);
+extern int kmmio_init(void);
+extern void kmmio_cleanup(void);
+
+#ifdef CONFIG_MMIOTRACE
+/* kmmio is active by some kmmio_probes? */
+static inline int is_kmmio_active(void)
+{
+ return kmmio_count;
+}
+
+/* Called from page fault handler. */
+extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
+
+/* Called from ioremap.c */
+extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
+ void __iomem *addr);
+extern void mmiotrace_iounmap(volatile void __iomem *addr);
+
+/* For anyone to insert markers. Remember trailing newline. */
+extern int mmiotrace_printk(const char *fmt, ...)
+ __attribute__ ((format (printf, 1, 2)));
+#else /* !CONFIG_MMIOTRACE: */
+static inline int is_kmmio_active(void)
+{
+ return 0;
+}
-/*
- * These structures are used to allow a single relay_write()
- * call to write a full packet.
- */
+static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr)
+{
+ return 0;
+}
-struct mm_io_header_rw {
- struct mm_io_header header;
- struct mm_io_rw rw;
-} __attribute__((packed));
+static inline void mmiotrace_ioremap(resource_size_t offset,
+ unsigned long size, void __iomem *addr)
+{
+}
+
+static inline void mmiotrace_iounmap(volatile void __iomem *addr)
+{
+}
+
+static inline int mmiotrace_printk(const char *fmt, ...)
+ __attribute__ ((format (printf, 1, 0)));
+
+static inline int mmiotrace_printk(const char *fmt, ...)
+{
+ return 0;
+}
+#endif /* CONFIG_MMIOTRACE */
+
+enum mm_io_opcode {
+ MMIO_READ = 0x1, /* struct mmiotrace_rw */
+ MMIO_WRITE = 0x2, /* struct mmiotrace_rw */
+ MMIO_PROBE = 0x3, /* struct mmiotrace_map */
+ MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */
+ MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */
+};
+
+struct mmiotrace_rw {
+ resource_size_t phys; /* PCI address of register */
+ unsigned long value;
+ unsigned long pc; /* optional program counter */
+ int map_id;
+ unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */
+ unsigned char width; /* size of register access in bytes */
+};
+
+struct mmiotrace_map {
+ resource_size_t phys; /* base address in PCI space */
+ unsigned long virt; /* base virtual address */
+ unsigned long len; /* mapping size */
+ int map_id;
+ unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */
+};
-struct mm_io_header_map {
- struct mm_io_header header;
- struct mm_io_map map;
-} __attribute__((packed));
+/* in kernel/trace/trace_mmiotrace.c */
+extern void enable_mmiotrace(void);
+extern void disable_mmiotrace(void);
+extern void mmio_trace_rw(struct mmiotrace_rw *rw);
+extern void mmio_trace_mapping(struct mmiotrace_map *map);
+extern int mmio_trace_printk(const char *fmt, va_list args);
-#endif /* MMIOTRACE_H */
+#endif /* _LINUX_MMIOTRACE_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff